PHPWales 2020 - June 3rd to June 4th

mb_ereg_match

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

mb_ereg_matchCompararción de expresiones regulares para strings multibyte

Descripción

mb_ereg_match ( string $pattern , string $string [, string $option = "msr" ] ) : bool

Una compararción de expresiones regulares para strings multibyte.

Parámetros

pattern

El patrón de la expresión regular.

string

El string a ser evaluado.

option

Valores devueltos

Devuelve TRUE si string coincide con la expresión regular pattern, FALSE si no.

Notas

Nota:

La codificación interna o la codificación especificada por mb_regex_encoding() será usada en esta función.

Ver también

  • mb_regex_encoding() - Establecer/obtener la codificación de caracteres para expresiones regulares multibyte
  • mb_ereg() - Comparación de expresiones regulares con soporte multibyte

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User Contributed Notes 3 notes

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8
Anonymous
3 years ago
The behaviour of mb_ereg_match to imply a ^ at the beginning of the pattern stands in stark contrast to the behaviour of mb_ereg where ^ is NOT implied.

Switching between those two routines (because the need to extract a subpattern changes) requires careful consideration when to compensate for this surprising inconsistence.
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7
Anonymous
11 years ago
Note that this function matches a string from the beginning only (though not necessarily till the end):

<?php

$test
= mb_ereg_match("a", "some apples"); // returns false
$test = mb_ereg_match("a", "a kiwi");      // returns true

?>

If you want to check for a match anywhere in the string, use the wild-card & repeat operators .*

<?php

$test
= mb_ereg_match(".*a", "some apples"); // returns true

?>
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-1
webdesign at innato dot nl
8 months ago
It took me a while to discover that you must escape characters like parentheses (), square brackets [] and ^ (and maybe more) if you want to match these as a literal. Otherwise you may get some erratic outcome.

In summary, using a match anywhere in the string as an example:

<?php
$needle
= "[";
$haystack = "some_array[]";
$test= mb_ereg_match(".*".$needle, $haystack);   // returns false and a php warning

$test= mb_ereg_match('.*'.preg_quote($needle), $haystack);   // returns true
?>
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